extract some queries from the app pages

client/src/EditPage.jsx

@@ -4,85 +4,95 @@ import './App.css';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useState } from 'react';
-
-const url = "http://127.0.0.1:3001"
+import { apiUrl, fetchPage, postPage, deletePage } from './clientStuff.jsx';
 
 function PageView() {
   const queryClient = useQueryClient();
   const navigate = useNavigate();
   const { pagenumber } = useParams();
-  const [ text_of_page, setBodyText ] = useState("Not loaded yet");
 
-  const { isPending, error, data } = useQuery({ // fetch the currrent values
+  const fetchQuery = useQuery({ // fetch the currrent values
     queryKey: ['page', pagenumber],
-    queryFn: () =>
-      fetch(`${url}/page/${pagenumber}`, {
-        method: 'GET',
-        headers: {'Content-Type': 'application/json'}
-      }).then((res) => res.json())
-        .then((data) => {
-          setBodyText(data[2])
-          return data;
-        })
+    queryFn: () => fetchPage(pagenumber)
   })
 
-  const mutation = useMutation({ // for changing the value when we're done with it
-    mutationFn: ({id, title, description}) => {
-      console.log("trying to update!");
-      const body = JSON.stringify({id: id, title: title, description: description})
-      console.log(`sending ${body}`)
-      fetch(`${url}/page/${pagenumber}`, {
-        method: 'POST',
-        headers: {'Content-Type': 'application/json'},
-        body: body
-      }).then((res) => { console.log("tried to update!", res.json()) })
-        .catch((error) => { console.log("got an error", error.json()) });
-    },
+  const postMutation = useMutation({ // for changing the value when we're done with it
+    mutationFn: ({id, title, description}) => postPage({id, title, description}),
     onSettled: async (data, error, variables) => {
       // Invalidate and refetch
       await queryClient.invalidateQueries({ queryKey: ['page', variables.id] })
     },
   });
 
-  function handleSubmit(e) {
-    e.preventDefault()
-    const data = e.target.querySelector('pre').innerHTML
-    const formData = new FormData(e.target);
-    mutation.mutate({
+  const deleteMutation = useMutation({ // for changing the value when we're done with it
+    mutationFn: (id) => deletePage(id),
+    onSettled: async (data, error, variables) => {
+      // Invalidate and refetch
+      await queryClient.invalidateQueries({ queryKey: ['pages'] })
+    },
+  });
+
+  const ready = !(fetchQuery.error || fetchQuery.isPending);
+
+  let the_id, page_title, page_text, page_html;
+  if (ready) [the_id, page_title, page_text, page_html] = fetchQuery.data;
+  if (!page_title) page_title = " ";
+  if (!page_text) page_text = " ";
+
+  function submitChanges(e) {
+    const newTitle = document.querySelector('span').innerHTML;
+    const newText = document.querySelector('pre').innerHTML;
+    postMutation.mutate({
       id: pagenumber, 
-      title: page_title, 
-      description: data,
+      title: newTitle, 
+      description: newText,
     });
     navigate(`/${pagenumber}`)
   }
 
-  if (isPending) return "Loading...";
-
-  if (error) return "Uh oh!";
+  function submitDelete(e) {
+    e.preventDefault();
+    deleteMutation.mutate(pagenumber);
+    navigate(`/`);
+  }
 
-  const [the_id, page_title, page_text] = data;
 
   return (
     <div className="App">
-      <form onSubmit={handleSubmit}>
         <header className="App-header">
-          <img src={logo} className="App-logo" alt="logo" />
+          <a href="/"><img src={logo} className="App-logo" alt="logo" /></a>
           <div className="Page-title">
-            <h3>{the_id}. {page_title}</h3>
-          </div>
-          <div className="Page-contents">
-            <pre 
-              contentEditable="true"
-              onChange={(e) => setBodyText(e.target.value)} 
-              dangerouslySetInnerHTML={{__html: text_of_page}} />
+            <h3>
+              {pagenumber}. 
+              <span 
+                contentEditable="true" 
+                dangerouslySetInnerHTML={{__html: ready ? page_title : "..." }} />
+            </h3>
           </div>
-          <button 
-            type="submit" 
-            disabled={mutation.isPending}>
-            {mutation.isPending ? "Updating..." : "Update"}
-          </button>
+          { ready ? 
+            <>
+              <div className="Page-contents">
+                <pre 
+                  contentEditable="true"
+                  dangerouslySetInnerHTML={{__html: page_text}} />
+              </div>
+              <button 
+                disabled={postMutation.isPending}
+                onClick={submitChanges}>
+                {postMutation.isPending ? "Updating..." : "Update"}
+              </button>
+              <button
+                disabled={deleteMutation.isPending}
+                onClick={submitDelete}>
+                {deleteMutation.isPending ? "Deleting..." : "Delete this page (no backsies)"}
+              </button>
+            </>
+            :
+            <div className="Page-contents">
+              { fetchQuery.isPending ? "Loading..." : JSON.stringify(fetchQuery.error) }
+            </div>
+          }
         </header>
-      </form>
     </div>
   );
 }

client/src/Landing.jsx

@@ -4,32 +4,22 @@ import './App.css';
 import { useNavigate } from 'react-router-dom'
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 
-const url = "http://127.0.0.1:3001"
+import { apiUrl, fetchPageList, postNewPage } from './clientStuff.jsx';
 
 function Landing() {
   const queryClient = useQueryClient();
   const navigate = useNavigate();
   const { isPending, error, data } = useQuery({ // fetch the currrent values
     queryKey: ['pages'],
-    queryFn: () =>
-      fetch(`${url}/pages`, {
-        method: 'GET',
-        headers: {'Content-Type': 'application/json'}
-      }).then((res) => res.json())
+    queryFn: fetchPageList
   })
 
   const makeNewPage = useMutation({ // for changing the value when we're done with it
-    mutationFn: () => 
-      fetch(`${url}/page/new`, {
-        method: 'POST',
-        headers: {'Content-Type': 'application/json'},
-      }).then((res) => res.json())
-        .then((data) => data.id)
+    mutationFn: () => postNewPage()
         .catch((error) => { console.log("got an error", error.json()) }),
     onSettled: async (data, error, variables) => {
       // Invalidate and navigate to the new page
       await queryClient.invalidateQueries({ queryKey: ['pages'] });
-      console.log(data);
       navigate(`/${data}/edit`);
     },
   });
@@ -37,13 +27,15 @@ function Landing() {
   return (
     <div className="App">
       <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
+        <a href="/"><img src={logo} className="App-logo" alt="logo" /></a>
         <h3>Welcome to the forest!</h3>
+        <h4>This is some random stuff I added!</h4>
         { isPending ?
           "Loading..." :
           (error ?
-            (<pre>{error}</pre>) :
-            <ol>
+            <pre>{error}</pre>
+            :
+            <ul>
             { 
               data.map((row) =>
                 <li>
@@ -51,10 +43,10 @@ function Landing() {
                 </li>
               )
             }
-            </ol>
+            </ul>
           )
         }
-        <button onClick={makeNewPage.mutate} >Make new page!</button>
+        <button onClick={makeNewPage.mutate} >Dig!</button>
       </header>
     </div>
   );

client/src/PageView.jsx

@@ -4,46 +4,41 @@ import './App.css';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { useParams, useNavigate } from 'react-router-dom';
 import { useState } from 'react';
-
-const url = "http://localhost:3001"
+import { apiUrl, fetchPage, postPage } from './clientStuff.jsx';
 
 function PageView() {
-  const navigate = useNavigate();
   const queryClient = useQueryClient();
+  const navigate = useNavigate();
   const { pagenumber } = useParams();
-  const [ text_of_page, setBodyText ] = useState("Not loaded yet");
   
   const { isPending, error, data } = useQuery({ // fetch the currrent values
     queryKey: ['page', pagenumber],
-    queryFn: () =>
-      fetch(`${url}/page/${pagenumber}`, {
-        method: 'GET',
-        headers: {'Content-Type': 'application/json'}
-      }).then((res) => res.json())
-        .then((data) => {
-          //console.log(`got ${data} as a response for ${pagenumber}`);
-          setBodyText(data[3]);
-          return data;
-        })
+    queryFn: () => fetchPage(pagenumber)
   })
 
-  if (isPending) return "Loading...";
+  const ready = !(error || isPending);
 
-  if (error) return "Uh oh!";
-
-  const [the_id, page_title, page_text, page_html] = data;
+  let the_id, page_title, page_text, page_html;
+  if (data) [the_id, page_title, page_text, page_html] = data;
 
   return (
     <div className="App">
       <header className="App-header">
-        <img src={logo} className="App-logo" alt="logo" />
+        <a href="/"><img src={logo} className="App-logo" alt="logo" /></a>
         <div className="Page-title">
-          <h3>{the_id}. {page_title}</h3>
+          <h3>{pagenumber}. {ready ? (page_title || " ") : "..."}</h3>
         </div>
-        <div 
-          className="Page-contents" 
-          dangerouslySetInnerHTML={{ __html: text_of_page }}
-        />
+        { ready ? 
+          <div 
+            className="Page-contents" 
+            dangerouslySetInnerHTML={{ __html: (page_html || " ") }}
+          />
+          :
+          <div className="Page-contents">
+            { isPending ? "Loading..." : JSON.stringify(error) }
+          </div>
+        }
+
         <button type="submit" onClick={() => navigate(`/${pagenumber}/edit`)}>Edit this page!</button>
       </header>
     </div>

client/src/clientStuff.jsx

@@ -0,0 +1,43 @@
+export const apiUrl = "http://127.0.0.1:3001"
+
+const defaults = {
+	headers: {'Content-Type': 'application/json'}
+};
+
+export async function postNewPage() {
+	return fetch(`${apiUrl}/page/new`, {
+        method: 'POST',
+        ...defaults
+      }).then((res) => res.json())
+        .then((data) => data.id)
+}
+
+export async function fetchPageList() {
+	return fetch(`${apiUrl}/pages`, {
+        method: 'GET',
+        ...defaults
+    }).then((res) => res.json())
+}
+
+export async function fetchPage(id) {
+	return fetch(`${apiUrl}/page/${id}`, {
+        method: 'GET',
+        ...defaults
+    }).then((res) => res.json())
+}
+
+export async function postPage({id, title, description}) {
+	return fetch(`${apiUrl}/page/${id}`, {
+        method: 'POST',
+        body: JSON.stringify({id: id, title: title, description: description}),
+        ...defaults
+    })
+}
+
+export async function deletePage(id) {
+	return fetch(`${apiUrl}/page/${id}`, {
+		method: 'DELETE',
+		headers: {'Content-Type': 'application/json'},
+		...defaults
+	})
+}

db/the_big_db.db/dbs/default/stats.json

@@ -1 +1 @@
-{"id":"7de13931-444c-4dd2-a19a-5cd1e70b7f36","rows_written":87,"rows_read":1016,"storage_bytes_used":12288,"write_requests_delegated":0,"current_frame_no":86,"top_query_threshold":3,"top_queries":[{"rows_written":2,"rows_read":1,"query":"\ncreate table if not exists renders (\n        id integer primary key,\n        title varchar(255),\n        description text\n)\n"},{"rows_written":0,"rows_read":4,"query":"select id from pages"},{"rows_written":0,"rows_read":5,"query":"select id from pages"},{"rows_written":1,"rows_read":4,"query":"\nalter table pages \nadd column html text\n"},{"rows_written":0,"rows_read":6,"query":"\nselect p.id from pages p where not exists (select r.id from renders r where p.id = r.id)\n"},{"rows_written":0,"rows_read":10,"query":"select id from pages"},{"rows_written":0,"rows_read":11,"query":"select id from pages"},{"rows_written":0,"rows_read":12,"query":"select id from pages"},{"rows_written":0,"rows_read":13,"query":"select id from pages"},{"rows_written":0,"rows_read":14,"query":"select id from pages"}],"slowest_query_threshold":0,"slowest_queries":[{"elapsed_ms":0,"query":"select id, title, description from pages where id=@val","rows_written":0,"rows_read":1},{"elapsed_ms":0,"query":"select title from pages","rows_written":0,"rows_read":1},{"elapsed_ms":0,"query":"select title from pages","rows_written":0,"rows_read":2},{"elapsed_ms":1,"query":"\nalter table pages \nadd column html text\n","rows_written":1,"rows_read":4},{"elapsed_ms":1,"query":"\ncreate table if not exists renders (\n        id integer primary key,\n        title varchar(255),\n        description text\n)\n","rows_written":2,"rows_read":1},{"elapsed_ms":1,"query":"insert into pages (title, description) values (?, ?) returning id","rows_written":1,"rows_read":1},{"elapsed_ms":1,"query":"replace into pages (id, title, description) values (?, ?, ?)","rows_written":1,"rows_read":1},{"elapsed_ms":1,"query":"select * from pages where id=@val","rows_written":0,"rows_read":1},{"elapsed_ms":1,"query":"select count(*) as num_pages from pages","rows_written":0,"rows_read":1},{"elapsed_ms":7,"query":"replace into pages (id, title, description) values (?, ?, ?)","rows_written":1,"rows_read":1}],"embedded_replica_frames_replicated":0,"query_count":665,"query_latency":74555}
+{"id":"7de13931-444c-4dd2-a19a-5cd1e70b7f36","rows_written":109,"rows_read":1706,"storage_bytes_used":12288,"write_requests_delegated":0,"current_frame_no":108,"top_query_threshold":3,"top_queries":[{"rows_written":2,"rows_read":1,"query":"\ncreate table if not exists renders (\n        id integer primary key,\n        title varchar(255),\n        description text\n)\n"},{"rows_written":0,"rows_read":4,"query":"select id from pages"},{"rows_written":0,"rows_read":5,"query":"select id from pages"},{"rows_written":1,"rows_read":4,"query":"\nalter table pages \nadd column html text\n"},{"rows_written":0,"rows_read":6,"query":"\nselect p.id from pages p where not exists (select r.id from renders r where p.id = r.id)\n"},{"rows_written":0,"rows_read":10,"query":"select id from pages"},{"rows_written":0,"rows_read":11,"query":"select id from pages"},{"rows_written":0,"rows_read":12,"query":"select id from pages"},{"rows_written":0,"rows_read":13,"query":"select id from pages"},{"rows_written":0,"rows_read":14,"query":"select id from pages"}],"slowest_query_threshold":0,"slowest_queries":[{"elapsed_ms":0,"query":"select id, title, description from pages where id=@val","rows_written":0,"rows_read":1},{"elapsed_ms":0,"query":"select title from pages","rows_written":0,"rows_read":1},{"elapsed_ms":0,"query":"select title from pages","rows_written":0,"rows_read":2},{"elapsed_ms":1,"query":"\nalter table pages \nadd column html text\n","rows_written":1,"rows_read":4},{"elapsed_ms":1,"query":"\ncreate table if not exists renders (\n        id integer primary key,\n        title varchar(255),\n        description text\n)\n","rows_written":2,"rows_read":1},{"elapsed_ms":1,"query":"insert into pages (title, description) values (?, ?) returning id","rows_written":1,"rows_read":1},{"elapsed_ms":1,"query":"replace into pages (id, title, description) values (?, ?, ?)","rows_written":1,"rows_read":1},{"elapsed_ms":1,"query":"select * from pages where id=@val","rows_written":0,"rows_read":1},{"elapsed_ms":1,"query":"select count(*) as num_pages from pages","rows_written":0,"rows_read":1},{"elapsed_ms":7,"query":"replace into pages (id, title, description) values (?, ?, ?)","rows_written":1,"rows_read":1}],"embedded_replica_frames_replicated":0,"query_count":877,"query_latency":90259}

server/server.js

@@ -35,26 +35,9 @@ app.get('/pages', (req, res) => {
 		.then((data) => data[0].results.rows)
 		.then((rows) => rows.map(([id]) => id))
 		.then((ids) => res.json(ids))
-		.catch((error) => res.status(404).json({"error": "error"}));
+		.catch((error) => res.status(500).json({"error": error}));
 });
 
-app.get('/page/:id', (req, res) => {
-	fetch(db_url, {
-    method: 'POST',
-    headers: {'Content-Type': 'application/json'},
-    body: JSON.stringify({
-      statements: [{
-        q: 'select * from pages where id=?',
-        params: [req.params.id]
-      }]
-    })
-  }).then((rsp) => rsp.json())
-    .then((data) => data[0].results.rows[0])
-    .then((row) => res.json(row))
-    .catch((error) => res.status(404).json({"error": error}));
-});
-
-
 app.post('/page/new', (req, res) => {
 	fetch(db_url, {
 		method: 'POST',
@@ -68,7 +51,25 @@ app.post('/page/new', (req, res) => {
 	}).then((rsp) => rsp.json())
 		.then((data) => data[0].results.rows[0][0])
 		.then((row) => res.status(200).json({id: row}))
-		.catch((error) => res.status(404).json({"error": error}))
+		.catch((error) => res.status(500).json({"error": error}))
+});
+
+app.get('/page/:id', (req, res) => {
+	fetch(db_url, {
+    method: 'POST',
+    headers: {'Content-Type': 'application/json'},
+    body: JSON.stringify({
+      statements: [{
+        q: 'select * from pages where id=?',
+        params: [req.params.id]
+      }]
+    })
+  }).then((rsp) => rsp.json())
+    .then((data) => {
+    	if (data[0].results.rows.length == 0) return res.status(404).json({"error": "page not found in db"});
+    	return data[0].results.rows[0];
+  }).then((row) => res.status(200).json(row))
+    .catch((error) => res.status(500).json({"error": error}));
 });
 
 app.post('/page/:id', (req, res) => {
@@ -90,5 +91,21 @@ app.post('/page/:id', (req, res) => {
       }]
     })
   }).then(() => res.status(200).json({}))
-    .catch((error) => res.status(404).json({"error": error}));
+    .catch((error) => res.status(500).json({"error": error}));
 });
+
+app.delete('/page/:id', (req, res) => {
+	console.log(`deleting page #${req.params.id}`);
+
+	fetch(db_url, {
+		method: 'POST',
+		headers: {'Content-Type': 'application/json'},
+		body: JSON.stringify({
+			statements: [{
+				q: 'delete from pages where id = ?',
+				params: [Number(req.params.id)]
+			}]
+		})
+	}).then(() => res.status(200).json({id: req.params.id}))
+		.catch((error) => res.status(500).json({"error": error}))
+})